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(No Model.) 2 sheetssheet 1.'

H. SCHOLPIELD.

1\.]5 P.111M1TUS FOR DRYING COFFEE, GRAIN, dw.

No. 253,111. Patented Jan. 31,1882.-

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ATTORNEYS.

(No Model.) 2' Sheets-Sheet 2.

H. SGHOLPIELD. APPARATUS POR DRYING COFFEE, GRAIN, das.

Patented Jam-31,1882.

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N. PETERS. Phumumngmphor. wnninmn. D. C.

NrTnn STATES PATENT Taten.

HENRY SOHOLFIELI), OF NEW YORK, N. Y.

APPARATUS FOR DRYING COFFEE, GRAIN, 86C.

SPECIFICATION forming part of Letters Patent No. 253,111, dated January 31, 1882.

' Application filed August 8, 1881. (No model.)

To all whom it may concern Be it known that I, HENRY SoHoLFnLLn, knight, ot' Great Britain and Ireland, at present residing in the city, county, and State of 'New York, haveinvented certain new and useful Improvements in Apparatus for Drying` Coffee, Grain, Fruit, and other Materials, of which the following is a specication.

rllhis invention relates to apparatus for drying or evaporating the moisture from various materials such as green coffee, grain, etc.- by heated air.

The object of the improvements is to obtain rapidity ot' laction and efficiency of operation, so that the material shall be properly dried at small expense and without risk of damage by excessive heat. Further, the object is to furnish an apparatus that can be operated by unskilled workmen.

I make use ofa drying-chamber with a closed top, from which rises an escape-flue or chimney containing an aspirator. Below the chamber are steam-heaters, and the chamberis provided With a series of perforated floors jointed in sections, so as to be turned for discharge of the material from the upper to the lower iioors in succession as the drying proceeds.

In the accompanying drawings, Figure 1' is a vertical section of a drying apparatus containing my improvements; and Fig. 2 is a side elevation ofthe same, showing the connectingpipes s in section.

Similar letters of reference indicate corresponding parts.-

A is the drying-chamber, elevated on suitable supports sufliciently to give room beneath for discharge of the dried material. This chamber is preferably constructed of cast-iron, and is provided at the top with an escape-flue or chimney, O, containing an aspirator, D. In the lower part of chamber A are steam-radiators E, which may be of any suitable construction, and are each surrounded by inclined plates a a a2, of metal, Which direct the air into contact with the radiators and form chutes between the radiators for the discharge of the material. rIhe radiators E connect by pipes s to a suitable steamgenerator, to which, also, the aspirator is connected by a pipe, c, and pipes d from the radiators carry off the water The chamber A isot' rectanof condensation.

guiar form, and is divided horizontally by tloors e, constructed as next described.

ff are r'ods sustained in the side plates of the chamber and carrying flaps g, of perforated material, which compose the oors. Outside the chamber there are crank arms h on the ends of rods f, and on the arms h are pivoted the bars z'.

k are hand-levers hung on studs l and connected hyyokes m with bars t'. By an endwise movement of bars t' the rods fare given aquarterturn, and the daps g are turned from the horizontal position to the vertical position shown in dotted lines, or vice versa. The levers and bars t' are held in place, when the aps are raised, bypins a, that are inserted through the levers into recessed studs on the plates of the chamber. On removal of the pins a the weight of material will be sufficient to open the aps.

At the lower ends of the chutes there are hinged Iiaps or valves o, and a bar tted for movement by a lever, p, is connected to the several hinge-pins of the flaps, so that they may be simultaneously opened and closed. These valves or flaps will be opened only when material is to be discharged, and when closed they prevent inletof air except by the passages around the radiator.

In the top of chamber A are openings allowing insertion of the material. rIhe covers 0f those openings are arranged for being closed air-tight. v

In the operation of the machine steam is admitted to the aspirator and to the radiators. The aspirator acts to createa vacuum in the upper part ofthe chamber, and thus inducesa current of air from below, and the air being heated by the radiators, a constant current of heated air is maintained. Aquantityof material to be dried is placed ou the upper door, c, and after being allowed to remain for a short time it is discharged to the second door by opening the flaps g. rllhe flaps are then closed and a fresh supply is placed on the upper door. Aftera proper time the lrst-supplied material is discharged to the third floor and the second lot to the second door, and so on until all the floors contain the same quantity of material. At r, just above the lower lloor, is a hand-hole and cover, which allows the material to be inspected to deter- IOO mine the length of time it shall remain on the lower Hoor. In practice, however, the heat being uniform, inspection will not be necessary once the rate of drying is established. fhen the coffee or other material on the lower floor has remained a suficient length of time, ilaps o are to be opened and the material discharged from thc lower floor. By these successive operations the material is dried gradually, and the quantity on each iloor is not of sulicient bulk to prevent free passage of lthe heated air. Thedrying operation is thus placed under perfect control, and there is no-risk of discoloring thc material.

By use of the oors, as described, I am enabled to withdraw from the apparatus the material when sufficiently dry without interference with the partially-dried material.

, In Letters Patent granted to me March S, 188i, an aspirator and steam-coil are shown in combination with a drying` chamber. The

present invention is an improvement on the apparatus there shown.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. In a coffee-drier, the combination of flaps g, rodsj", crank-arms It, pivoted bars i, hand-levers k, and yokes m, substantially as and for the purposes described.

2. The combination, with the discharge valves or flaps o and the radiators E, of the plates a a! a2 about and above said radiator, substantially as described, whereby the air is guided in contact with the radiators and the dried coffee is conducted to the dischargevalves, as set forth.

HENRY SC HOLFIE LD.

Witnesses:

Guo. D. NVALKER, C. SEDGWICK. 

